Improvement in combined rules, bevels, squares, and dividers



GEORGE G. BURGESS.

or GRAFTON, OHIO.

Letters Patent No. 109,868, dated December 6, 1870; antedated November26, 1870.l

IMPllQVERtIEhI'I"A IN COMBINED RULES, BEVELS, SQUARES, AND. DIVIDES.

The Schedule referred to in these Letters Patent and making pari: of thesame.

I, GEORGE G. Boneless, of Grafton, in the county' of Lorain and State ofOhio, have invented certain Improvements in Combined Rule, Level, Tryand Bevel, Square, Dividers, and Calipers, of which the following is aspecification, in which- Figures 1, 2, 3, d, 5, and 6, are perspectiveviews.

The nature of my' invention relates to the combination of variousinstruments.hereinafter named, and to a new mode of making jointed orfolding rules, by which one part ot' a rule and' half' a joint aremallein one solid piece of rubber, or othei` suitable material, whichenables nie to make 'a-sngle jointed rule by simplynsing a. fulernm pinto hold the two rule parts together; thus dispensing with numerousrivets and various other detached parts.

',lhe following description will enable those skilled in the art to makeand use my improvement:

M y rule does notcilift'er in construction from those in common use,except in the modepf making the rule and joint from a singlel solidpiece of rubber, or other suitable material, as shown at tig. 1, `the(two) rule and hinge. parts are then joined together 'with a rivet, a,as shown at iig.- 2, by which much greater strength and cheapness areobtainedt .lhe try-square' part 3 is made quite thin, and nearly aslong'and wide as the part of the rule to which it is secured by a rivet,I), in a cavity, o, of corresponding shape, but much deeper,'to admitother parts, ywhich admits of its being opened up to a right angle, andis` then prevented from going further by a shoulder', (l, in the cavityo, tig. 2,:xnd shoulder e-tig. 3, coming together.A l 1 f, fig. 3, is anoblong slot, which extends halor' more the length of part 3, for thepurpose of' allowingl the adjustment o t tie adjoining parts on thescrew to any desired point in the slotf.

Before the binding-screw gis put to its place through the siotf, tig. 3,there is placed on it a. pair of coinbined calipers and dividers, j l.;and l on, the screw g passing through .them centrally, when one piece orhalf' ot' the calipers and dividers ismade rigid on' the opposite endfrom the screw, while the other half` part s lett tree to turn on thescrew g.'

The calipers and dividers are shaped nearly as shown at fig. 5, and whenclosed are about as Kwide and not quite as long as parts 3 and 4, whichall fold up in an oblong part and are closed down into the recess o inthe rule part, iig. 2.

Parts 2, 3, 4, and 5, j, k, l, m,and n, are all shown in la combinedform with the screw end g and bur c'. i

The bevel try-square part, tig. 4, corresponds in size and shape withpart tig. 3, with vonly a plain oblong slot, h, which extends to neareither end, and is held passed 'through slots f, tig. 3 and h, fig. 4,when the try and bevel-square with the calipers anddividers *in anydesired position for use or otherwise, in or ,out ot' pocket.

part, iig. i5, 'which is protected from injury, when not in use, by th'eother partot' the rulefolding over it.

is as follows: Y The try-square ready for use' by Opening part 3-to -aright angle. y.

The beveisqnare may then be usedby releasing the thumb-screw a little,when "it can be set at any desired angle and firmly held by.' the screwg.

'.Lhe calipers and dividers are,also used in tlicsamc way, the rulebeing an index on which the pointsv of \the"dividers rcst when using thecalipers, and cioe versa. v

' Whatl claim as new, and desire to secure by Lette rs Patent, isy p Afolding rule, in combination with the square and' bevel attachment,holding by means' Ot' the bindingscrew g, the combined calipers anddividers, thc whole being constructed and arranged to operate together,

substantialy. in the manner as shown and set forth.

GEORGE G. BURGESS.

itnessesz S. G. WrLMO'r, A. D. SniTH.

to its place onpart 3 by the bimling-screwg, which is v thumb-screw bnrc is screwed down, thus retaining the I also use a spirit-level, n, inthe edge ot' the rule The operation vof my combined rule and instruments

